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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-25304

Boessler, C; Paqué, F; Peters, O A (2009). The effect of electropolishing on torque and force during simulated root canal preparation with ProTaper shaping files. Journal of Endodontics, 35(1):102-106.

Accepted Version


Surface modifications of nickel-titanium instruments such as electropolishing may reduce fracture incidence but could potentially alter the instruments' mechanical properties. We studied the impact of two surface types, machined and electropolished, of ProTaper shaping files on torque and force during simulated root canal preparation. Pilot holes of 0.5-mm diameter were drilled perpendicularly through 3-mm thick human dentin discs and served as standardized simulated root canals (SSRCs). A total of 300 SSRCs were prepared with ProTaper Sx, S1, and S2 instruments using an automated testing platform. Maximum torque (in Ncm) and maximum force values (in N) were measured. In three experimental groups (Sx, S1, and S2) preparation of SSRCs was performed using electropolished versus machined instruments in the same dentin disc. For all three tested instruments, peak torque was higher for electropolished files; apically exerted forces were similar, except for Sx, in which machined instruments developed higher forces. We conclude that surface treatment by electropolishing alters the cutting ability of nickel-titanium rotary instruments.

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic for Preventive Dentistry, Periodontology and Cariology
DDC:610 Medicine & health
Date:January 2009
Deposited On:07 Dec 2009 13:36
Last Modified:27 Nov 2013 20:33
Publisher DOI:10.1016/j.joen.2008.09.008
PubMed ID:19084135
Citations:Web of Science®. Times Cited: 9
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Scopus®. Citation Count: 11

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